LM2937IMP-3.3/NOPB National Semiconductor, LM2937IMP-3.3/NOPB Datasheet

IC REG 400MA SOT223-3

LM2937IMP-3.3/NOPB

Manufacturer Part Number
LM2937IMP-3.3/NOPB
Description
IC REG 400MA SOT223-3
Manufacturer
National Semiconductor
Type
Voltage Regulatorr

Specifications of LM2937IMP-3.3/NOPB

Regulator Topology
Positive Fixed
Voltage - Output
3.3V
Voltage - Input
Up to 26V
Voltage - Dropout (typical)
0.11V @ 50mA
Number Of Regulators
1
Current - Output
400mA
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
SOT-223 (3 leads + Tab), SC-73, TO-261
Current, Output
500 mA
Current, Supply
10 mA
Package Type
SOT-223
Regulation, Line
9.9 mV
Regulation, Load
3.3 mV
Regulator Type
Positive Voltage Out
Resistance, Thermal, Junction To Case
3 °C/W
Temperature, Operating, Range
-40 to +125 °C
Voltage, Input
26 V
Voltage, Noise
99 μV
Voltage, Output
3.3 V
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Current - Limit (min)
-
Lead Free Status / Rohs Status
RoHS Compliant part Electrostatic Device
Other names
LM2937IMP-3.3
LM2937IMP-3.3TR

Available stocks

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LM2937IMP-3.3/NOPB
Manufacturer:
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Quantity:
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LM2937-2.5, LM2937-3.3
400mA and 500mA Voltage Regulators
General Description
The LM2937-2.5 and LM2937-3.3 are positive voltage regu-
lators capable of supplying up to 500 mA of load current.
Both regulators are ideal for converting a common 5V logic
supply, or higher input supply voltage, to the lower 2.5V and
3.3V supplies to power VLSI ASIC’s and microcontrollers.
Special circuitry has been incorporated to minimize the qui-
escent current to typically only 10 mA with a full 500 mA load
current when the input to output voltage differential is greater
than 5V.
The LM2937 requires an output bypass capacitor for stabil-
ity. As with most regulators utilizing a PNP pass transistor,
the ESR of this capacitor remains a critical design param-
eter, but the LM2937-2.5 and LM2937-3.3 include special
compensation circuitry that relaxes ESR requirements. The
LM2937 is stable for all ESR ratings less than 5Ω. This
allows the use of low ESR chip capacitors.
The regulators are also suited for automotive applications,
with built in protection from reverse battery connections,
Connection Diagrams and Ordering Information
TO-263 Surface-Mount Package
Order Number LM2937ET-2.5, LM2937ET-3.3,
See NS Package Number T03B
TO-220 Plastic Package
Front View
Top View
Order Number LM2937ES-2.5, LM2937ES-3.3,
10011324
10011326
See NS Package Number TS3B
two-battery jumps and up to +60V/−50V load dump tran-
sients. Familiar regulator features such as short circuit and
thermal shutdown protection are also built in.
Features
n Fully specified for operation over −40˚C to +125˚C
n Output current in excess of 500 mA (400mA for
n Output trimmed for 5% tolerance under all operating
n Wide output capacitor ESR range, 0.01Ω up to 5Ω
n Internal short circuit and thermal overload protection
n Reverse battery protection
n 60V input transient protection
n Mirror image insertion protection
SOT-223 package)
conditions
Order Number LM2937IMP-2.5, LM2937IMP-3.3,
See NS Package Number MA04A
SOT-223 Plastic Package
Front View
Side View
10011327
10011325

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LM2937IMP-3.3/NOPB Summary of contents

Page 1

... Wide output capacitor ESR range, 0.01Ω 5Ω n Internal short circuit and thermal overload protection n Reverse battery protection n 60V input transient protection n Mirror image insertion protection 10011324 Order Number LM2937IMP-2.5, LM2937IMP-3.3, See NS Package Number MA04A 10011326 See NS Package Number TS3B SOT-223 Plastic Package 10011325 ...

Page 2

... The small physical size of the SOT-223 package does not allow sufficient space to provide the complete device part number. The actual devices will be labeled with the package markings shown. Output Voltage 2.5 3.3 LM2937ES-3.3 LM2937ET-3.3 LM2937IMP-3.3 L68B L69B 2 (Continued) NSC Package Package ...

Page 3

... SOT-223 (Vapor Phase, 60 seconds) 215˚C SOT-223 (Infrared, 15 seconds) ESD Susceptibility (Note 3) Operating Conditions 26V Temperature Range (Note 2) 60V LM2937ES, LM2937ET Internally Limited 150˚C −65˚C to +150˚C LM2937IMP Input Voltage Range 260˚C 230˚C (Note 25˚ 2.5V Conditions Typ ≤ ...

Page 4

... SOT-223 3-Lead Plastic Surface Mount Package Order Number LM2937IMP-2.5, LM2937IMP-3.3, National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications. ...

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